Unit Development, Acceleration, PF work.

WIP, unit pf's don't work atm, not debugged yet, more than likely an
easy fix. Health bars are just commented out in the draw method
PF's now work! Need to add mouse control.

Movement is a big concern for me. Considering the potential (hurr) size
of a map, I'm thinking more and more than any kind of pathfinding method
we use will be inefficient unless we use dynamic tiles.